DHCP template generates as much of the subnet and range definition as possible.

- Closes: #1469

This makes it possible to disable just the dynamic range without losing access
to the next-server required by static host entries.

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

CHANGELOG.md

@@ -23,6 +23,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 - Removed partial support for regex searches in node and profile lists. #1635
 
+### Changed
+
+- DHCP template generates as much of the subnet and range definition as possible. #1469
+
 ## v4.6.0rc2, 2025-02-07
 
 ### Added